diff options
Diffstat (limited to 'kernel/include/linux/of_pdt.h')
| -rw-r--r-- | kernel/include/linux/of_pdt.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/kernel/include/linux/of_pdt.h b/kernel/include/linux/of_pdt.h new file mode 100644 index 000000000..7e09244bb --- /dev/null +++ b/kernel/include/linux/of_pdt.h @@ -0,0 +1,44 @@ +/* + * Definitions for building a device tree by calling into the + * Open Firmware PROM. + * + * Copyright (C) 2010 Andres Salomon <dilinger@queued.net> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + +#ifndef _LINUX_OF_PDT_H +#define _LINUX_OF_PDT_H + +/* overridable operations for calling into the PROM */ +struct of_pdt_ops { + /* + * buf should be 32 bytes; return 0 on success. + * If prev is NULL, the first property will be returned. + */ + int (*nextprop)(phandle node, char *prev, char *buf); + + /* for both functions, return proplen on success; -1 on error */ + int (*getproplen)(phandle node, const char *prop); + int (*getproperty)(phandle node, const char *prop, char *buf, + int bufsize); + + /* phandles are 0 if no child or sibling exists */ + phandle (*getchild)(phandle parent); + phandle (*getsibling)(phandle node); + + /* return 0 on success; fill in 'len' with number of bytes in path */ + int (*pkg2path)(phandle node, char *buf, const int buflen, int *len); +}; + +extern void *prom_early_alloc(unsigned long size); + +/* for building the device tree */ +extern void of_pdt_build_devicetree(phandle root_node, struct of_pdt_ops *ops); + +extern void (*of_pdt_build_more)(struct device_node *dp); + +#endif /* _LINUX_OF_PDT_H */ |